Requires

Displacer Kitten must be on the battlefield. Guile must be on the battlefield. Draining Whelk must be in hand. Mana needed:

Steps

1. Cast any noncreature spell from your hand by paying its mana cost, or wait for an opponent to cast one.
2. Holding priority, cast Draining Whelk by paying .
3. Draining Whelk enters the battlefield, exiling the spell and causing you to cast the spell from exile without paying its mana cost due to Guile, and putting a number of +1/+1 counters on Draining Whelk equal to the spell's mana value.
4. Displacer Kitten triggers, blinking Draining Whelk.
5. Repeat from step 3.

Results